1 Features
1• Dual Output Drive Stages in Push-Pull
Configuration
• 130-μA Typical Starting Current
• 1-mA Typical Run Current
• Operation to 1-MHz
• Internal Soft-Start
• On-Chip Error Amplifier With 2-MHz Gain
Bandwidth Product
• On-Chip VDD Clamping
• Output Drive Stages Capable Of 500-mA Peak
Source Current, 1-A Peak Sink Current

2 Applications
• Server and Desktop Power Supplies
• Telecom Power Supplies
• DC-DC Converters
• Switched-Mode Power Supplies

3 Description
The UCCx808-x is a family of BiCMOS push-pull,
high-speed, low-power, pulse-width modulators. The
UCCx808 contains all of the control and drive circuitry
required for offline or DC-to-DC fixed frequency
current-mode switching power supplies with minimal
external parts count.
The UCCx808-x dual output drive stages are
arranged in a push-pull configuration. Both outputs
switch at half the oscillator frequency using a toggle
flip-flop. The dead time between the two outputs is
typically 60 ns to 200 ns depending on the values of
the timing capacitor and resistors, thus limiting each
output stage duty cycle to less than 50%.